Which geological outcome primarily results from magma with high silica content and dissolved gases reaching Earth's surface?

💡 Explanation

When magma with high silica content and dissolved gases rises, increased viscosity restricts gas escape, causing pressure buildup and violent expansion during the eruption. Therefore, explosive eruptions result, rather than effusive flows or shield volcanoes which require lower viscosity magma and steady outgassing.

• Which outcome occurs when prolonged drought prevents loess stabilization?
• Which process sustains unusually high productivity along western margins of a continental gyre where upwelling occurs?
• Which mechanism most directly enhances stream downcutting into bedrock in humid temperate climates?
• Which process results after deglaciation causes isostatic rebound in a fjord landscape?
• Which outcome occurs when rapid snowmelt increases river discharge past the original design height of levees?
• Which mechanism creates the rain shadow effect on the leeward side of a mountain range?